Failure To Authendicate Domain/users

I have several access databases in mind to migrate to SQL server. I installed MS SQL 2005 Express on my machine. I will have procedures to run with authorizations beyond that of a common user, such as database administrative work where server agent is not available, I may rely on users' log-on prompt to do some maintenance work. However, I cannot get the EXEC AS 'DomainUser' to work. The procedures can be created OK. But whenever they are called, the following message shows up:

Msg 15404, Level 16, State 19, Procedure XXX, Line 0
Could not obtain information about Windows NT group/user 'DomainUser', error code 0xea.

I tried to tweak with the account under which the server service is running. There are three options under built-in account: Local system, Local service, and Network Service. My understanding is that Network Service will use the log-on of the current user of the computer. I have admin right of the computer. None of the three options work. Additionally, when I specify an account (my own account), it's the same thing.

The procedure xp_logininfo always fails when I query a specific domainuser.

The ADHelper is configured to run manually.

I could not think of other ways to get a possible solution. Any help is much appreciated.